Cast Credits The Hour (2011) Guest starring as Roedean Girl One Episode 1x03: A Country Affair (Aug 2, 2011) Downton Abbey (2010) Guest starring as Kitty Colthurst Episode 5x01: Episode 1 (Sep 21, 2014) Casualty (1986) Guest starring as Helen Rowlands Episode 28x12: Three's A Crowd (Oct 26, 2013)